Audit preparedness: implement unit tests

[michaeljklein]

Problem

Given list of unit tests from: #5361
Implement those unit tests.

Splitting list into sub-issues:

• Audit preparedness: assessing key cases #5361

Sub-issues:

• Audit preparedness: test binary operations #5426
• Audit preparedness: test crypto functions #5427

Happy Case

Implement unit tests for all key cases in the omnibus issue: #5173

Project Impact

None

Impact Context

No response

Workaround

None

Workaround Description

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Additional Context

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